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Atomic Fermi gas in the trimerized Kagom\'e lattice at the filling 2/3

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arxiv cond-mat/0412133 v3 pith:TYH773JG submitted 2004-12-06 cond-mat.other

Atomic Fermi gas in the trimerized Kagom\'e lattice at the filling 2/3

B. Damski , H.-U. Everts , A. Honecker , H. Fehrmann , L. Santos , M. Lewenstein This is my paper
classification cond-mat.other
keywords latticeatomicfermikagompropertiesquantumsystemtrimerized
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We study low temperature properties of an atomic spinless interacting Fermi gas in the trimerized Kagom\'e lattice for the case of two fermions per trimer. The system is described by a quantum spin 1/2 model on the triangular lattice with couplings depending on bonds directions. Using exact diagonalizations we show that the system exhibits non-standard properties of a {\it quantum spin-liquid crystal}, combining a planar antiferromagnetic order with an exceptionally large number of low energy excitations.

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